Very nice piece Robert. Scarlatti has so many gems like this; an under-rated composer. I like the warm tone of the piano. The hard part is having a good piano - no worries there. I do agree with the others that you can improve the sound in terms of noise - that's the easy part. If you're concerned about hiss, here are some tips: 1. If the hiss you're hearing is for the first time, then it's probably an inadvertent setting on the mic gain. 2. Are you using internal mics? if so, they're notoriously noisy and there's not much you can do about it short of altering the beautiful tone of the piano though the use of EQ. 3. The type of mic can cause noise too - back electret mics are noisy. 3. If you're using an external mic, then check the 3.5mm mic jacks - can form oxides and produce noise. Clean them with 70% alcohol and a Q-tip. 4. Check your mic, and cables, batteries in the mics, etc. 5. As far as swooshing/pumping sounds in the recording - turn off the Auto Gain switch. Set your levels manually according to the loudest passage. 6. Don't use Audicity for editing software because the moment you start editing, adding GVerb, EQ, etc. it introduces artifacts. I only use it to download it into the computer, then export it to another editing program like WaveLab, SoundtrackPro, Sonar, etc. The least expensive software offering full edit capability is the Adobe Audition. 7. Record in .wav if possible - less audible digital artifacts and higher fidelity of high frequencies. As far as mechanical noises from the instrument is concerned, keep the mics raised in the air 5-6ft high, and about 3-5ft away from the strings as a starting point. Try to keep the mics away from walls as nearby reflections will compete with the direct sound of the instrument.